Black Limestone Hearth Slab | 900×450×20mm

Direct-from-quarry Black Limestone (900 x 450 x 20 mm). Engineered with a calibrated 20–24 mm nominal thickness, a tactile fine-textured surface, and crisp, machine-sawn edges. Part of our Black Limestone range and our Limestone Hearths range.

Highlights

• Calibrated 20–24 mm Nominal Thickness: Precision-calibrated to ensure a flat, consistent bed height for quick, seamless installation and level bedding.
• Textured Sawn Finish (Tactile Orange Peel Feel): Feature-grained with a subtle, tactile orange peel texture that balances contemporary minimalism with anti-slip grip and natural character.
• Machine-Sawn Edges: Precision-cut 4-side sawn edges provide crisp, clean lines for seamless jointing and a sharp, architectural frame around your stove or insert fire.
• 14-Day Crack Guarantee: If your slab cracks within 14 days of delivery (provided it is installed within that same 14-day window), we'll replace it completely free.
• Free Photo Service: Every premium-grade order includes a free dispatch photo of your exact slab sent straight to you before delivery. Standard-grade slabs also include this service whenever a custom cutting or finishing service is added.
• Order a sample: Choose up to 2 free samples for a flat £5 delivery fee. See the texture and quality in person before committing to a full slab. Order your sample

Engineered with a calibrated 20–24 mm nominal thickness, a distinctive fine-textured surface, and machine-sawn edges, this high-grade black limestone delivers exceptional structural density and thermal performance. Exhibiting an attractive, warm charcoal-grey tone in its raw state, this low-porosity limestone darkens into a deep, velvety jet-black when treated with an impregnating sealer or colour intensifier. Purpose-designed for luxury fireplace hearths, stove pads, window sills, coping, and interior architectural steps where you need clean geometry and reliable durability. Available nationwide as single slabs, bespoke cut-to-size pieces, or full wholesale crates for trade buyers across the UK.

If your slab cracks within 14 days of delivery (provided it is installed within that same 14-day window), we'll replace it completely free.

Every premium-grade order includes a free dispatch photo of your exact slab sent straight to you before delivery. Standard-grade slabs also include this service whenever a custom cutting or finishing service is added.

Need custom cutouts, tailored edge profiles, or surface pre-treatments? Select from our workshop options before dispatch:

Cutting Only
• Factory Straight Cut (C-01 / C-02): Laser-guided precision sawn (+/- 1.50mm) with edge matching.

Premium Signature Finish
• Bespoke Profile Match (S-01): Custom edge reprofiling (pencil round, full bullnose) matching the sawn surface finish.
• Multi-Stage Face & Edge Honing (S-02): High-grit diamond pad refinement to restore refined edges after custom workshop cuts.
• K30 Chemical Deep Clean (S-03): Extracts micro-slurry and fine dust trapped during processing to ensure max sealer penetration.
• Stovax Dressing Oil / Satin Sealer Treatment (S-04): Professional-grade pre-sealing that locks in the rich, dark finish and provides instant oil and water stain protection.

See how our cutting, finishing, and sealing services work for slate and limestone.

• Flexible Quantities: Buy individual slabs for precise cut-to-size hearth work, or full crates for trade project savings across the UK.
  
• Nationwide Logistics: Direct-to-site delivery via 3rd-party nationwide pallet networks. Offloaded by tail lift and delivered kerbside.
  
• Customer Quotes: Call 01908 46 46 56 or email drawings to sales@blueskystone.com